Beamer bibliography over EXACTLY two pages, no matter how many references?

I have a requirement to output the bibliography for a beamer over exactly two pages, no matter how many references (output will be infinitely zoomable .pdf).

documentclass[8pt, xcolor=table]{beamer}
usepackage[american]{babel}
usepackage{csquotes}
usepackage[style=apa]{biblatex}
addbibresource{bibliography.bib}

begin{document}

begin{frame}
  frametitle{Bibliography}
printbibliography
end{frame}

end{document}