The sensor is hollow. And it's not the pressure you should worry about, but the rate of change in pressure. The sensor will compensate, but the opening is small and it won't compensate quickly. That's one of the reasons that in the re-flow temperature profile we don't want you heating and cooling the chip rapidly.
The chip will withstand a 'reasonable pressure', but build to that pressure slowly.
We don't do tests on how much pressure it will handle, so unfortunately there you are kind of on your own.
- john
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