An air filled balloon attached to a submarine has a volume of 150. L at the ocean's surface where the temperature is 27oC and the air pressure is 0.921 atm. If the sub decends to a water depth of 1500 feet where the pressure is 46.4 atm, and the balloon shrinks to a volume of 2.77 L, what is the water temperature (in degrees Celsius) in that location at that depth?