I'm assuming you mean a cube with a volume of 4.5 (cubic inches) 1 inch = 25.4 mm, so 1 in 3 (25.4 mm) 3 16387.064 mm 3 4.5 in 3 16387.064 (mm 3 in 3 ) = 73741.788 mm 3.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.