If each person paid an equal amount, who would save the most money? Explain your reasoning using at least two complete sentences. please help me I think I may know but I am not sure how to even explain it, thanks

Apyramid fits exactly inside a cube. the cube and the pyramid share the same square base, and they are both exactly the same height. the volume of the cube is 66 cubic inches. what is the volume of the pyramid? explain your answer. answer asap