Chemistry- Gay-Lussac's Law?

Why am I getting this wrong? I say that it's 1600 torr.

A weather balloon has a volume of 750 L when filled with helium at 8 degrees Celsius at a pressure of 380 torr.

What is the new volume of the balloon, where the pressure is 0.24 atm and the temperature is -15 degrees Celsius.
I mean, 1600 L
 
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