\documentclass{article} 
\usepackage{pgfplots} 
\begin{document} 

\begin{tikzpicture}
\begin{axis}[axis equal, title={scale mode=scale uniformly},view={45}{35.26}]
\addplot3 [mark=cube, mark size=2cm] coordinates {(0,0,0)};
\end{axis}
\end{tikzpicture}
\end{document} 
