One linear dimension cubed = a cube. Three cubes cubed = twenty-seven cube unit. These nine cube assemblies due to similar functions of polarity / depolarity will assemble into larger compound cubes of 18 and 27 cubical sections.

Figure 6.14 - Triple Three Cubes
(click to enlarge)

"And all that are three are nine - for all that are three are multiplied by three in this visible cube dominated universe of three dimensions." [Atomic Suicide, page 109]