Mariana's swimming pool holds 22,000 gallons of water. If there are approximately 7.5 gallons per cubic foot, determine the size of the swimming pool, in terms of cubic feet, Mariana have. Round your answer to the nearest cubic foot.
A) 3 ft^3
B) 2,933 ft^3
C) 34,091 ft^3
D) 165,000 ft^3