actually, you might need a bit more....
9 inch top, 8 inch bottom (sides slanted), 1.5 inches depth =85.1 cubic inches filling.
divide by six = 14.2 cubic inches per mini of filling for a theoretical six minis
a mini, top 4 inches, bottom 3 inches (ie same side "angle"), same depth has 14.4 cubic inches for volume....
could not find the sizes off the minis on the web; just guessing. if you have them, measure them & post and I'll plug the numbers into the formula.