It's not so much about the air escaping as it is letting the water in. That's what you want to do ultimately if you're going to survive a submerged situation like that. Of course, letting the air out, something has to occupy that space. So I get what you're saying.
Question is, how do you get the water in. There are only 4 ways I can think of it.
1) The pod suffered structural damage from the impact and is taking on water "naturally". At which point it becomes a waiting game for the pressure to equalize. But if you take water on so slowly that the end pressure is great enough to crush you to death - whats the point?
2) You have a weapon capable of breaking through the windows in the pod to let water in. I'm going to assume that those pod windows are bulletproof to say the least. I mean, they can survive an impact like that. They'll probably survive an SMG or a pistol shot. You'd probably just end up shooting yourself in the ricochet. Or maybe you have a punch-like tool that they sell for vehicles today which would be much more reasonable and economical.
3) There is already some kind of system built into the pod that will allow you to let water in. Just activate (provided that system wasn't damage or malfunctioning) and wait for the fun to begin.
4) You aren't deep enough where you can still use the blast bolts and it actually works in your favor. If you are shallow enough where the blast bolts can slide the door clean off, then you're home free. If you're deep enough where it won't slide the door off, maybe you are still shallow enough where it can offset the door enough to let water seep in. But if you're too deep, you blow those bolts and all it does is make the door hickup because the kinetic force of the blast bolts isn't enough to push the surface area of the door against the outside pressure - and you're hosed. Unless the blast bolts actually detonate some holes in the door seals. At which point, you go back to the waiting game.
Based off of what I'm thinking, you will not survive on your own accord once you get to a point where the water pressure is enough to kill you or rapid depressurization will take you out. As was said, the ODST suits are rated for the pressures of space. But not so much under water. And all of this is a given.
My end idea here is that if you didn't hit a terminal velocity, came in at a sharp angle which caused you to skip across the surface for a bit, and were able to deploy the blast bolts fast enough, you can get out of the pod. Afterwards, as has been said, you're still stuck in the ocean. Your survival at that point is how well you can swim or how lucky you are if there's a boat nearby.