I use a program called iccgamut for plotting icc profiles and tiffgamut for plotting the gamut of a tiff file. Both are part of a free extensive suite of colour management programs called
argyll cms. The suite is not for the faint of heart as it is all command line interface but the documentation is excellent. Unfortunately, it does not handle ICC Version 4 profile yet. Both programs generate a HTML file that uses the W3DCOM capabilities of modern web browsers to do the actual plotting in 3D. The generated plots can be rotated in space.