Saving slides as high resolution images from PowerPoint

Hello! I need a little assistance.

I need to save jpegs or pngs from my slides in PowerPoint but they come out all blurry. The highest PP will let me save them is 2249 x 1738.

I've also tried saving it as a pdf and then exporting the images as jpegs and pngs and they are still fuzzy. 😟

I have a brand new Mac Pro and am running the latest version of PowerPoint.

Thank you in advance!

Heather