The male magnificent frigatebird inflates a red pouch under his neck to attract females. Along with the inflated pouch, the bird makes a drumming-like sound whose frequency F, in hertz, is related to the volume V, in cubic centimeters, of the pouch by the equation
F = −5.5V + 5400.


Use the equation to estimate the volume of the pouch when the frequency of the sound is 750 hertz. Round to the nearest cubic centimeter.