Ideal Gas Law: Solving Air Bubble Volume at Different Depths

[Perrin]

Homework Statement

An air bubble of volume 1cm^3 is located at a depth of 50m beneath the surface where the temperature is 17C. When the bubble goes up to the surface where the temperature is 27C, how much will its volume be? Take the atmospheric pressure to be 1atm. Assume the pressure increases 1atm for every 10 meters.

Homework Equations

Ideal Gas Law:
pV=nRT

The Attempt at a Solution

p_{1}v_{1}/T_{1}=p_{2}v_{2}/T_{2}

I plugged in:

5\times10^{5}\times1\times10^{-6}/290=1\times10^{5}\times V_{2}/300

Solving for V2, I get 5.2cm^3, but according to the solutions, that's not the answer...
I'd like to know what I'm doing wrong.
Thanks for the help!

 

[ideasrule]

At 50 m, the pressure due to the water is 5 atm. You still have to add in the atmospheric pressure.