Newer versions of PowerPoint allow you to Save&Send as PDF. Use that feature to create a PDF file, then open that in Inkscape and edit by ungrouping, then resize the page to the drawing and save as SVG.
Newer versions of PowerPoint allow you to Save&Send as PDF. Use that feature to create a PDF file, then open that in Inkscape and edit by ungrouping, then resize the page to the drawing and save as SVG.