sharepoint online – iframe & removing scroll bars

Hi I have an iframe and I am trying to hide the scroll bar however with the code I’m assuming it doesn’t seem to disappear. Any suggestions?

enter image description here

<div style="overflow: hidden; margin: 15px auto; max-width: 800px;">
<iframe scrolling="no" src="" style="border: 0px none; width: 750px; height: 500px; ">