You know, it's not actually P.C. anymore to talk "Cubic Inches" :jester but since I do it all the time I just happen to know your answer

:
5.3 L = 325 cubic inches
6.0 L = 364 cubic inches
Disclaimer for all you math wizards out there: The actual displacements of 5326 and 5970 CC's respectively have been rounded off to the nearest tenth litre and whole cubic inch.
Blast