In the number analogy 2 : 27 :: 4 : ?, which value replaces the question mark?

The number is raised by one and the result is cubed, so 2 leads to 3 cubed, which is 27, and 4 leads to 5 cubed, which is 125. The sharpest trap is 64, the cube of 4 itself, but cubing the number without raising it would have made the first term 8 and not 27. 216 cubes 6, that is two steps up, and 100 answers to no rule at all.