How can I scale the content of an iframe?

#wrap { width: 600px; height: 390px; padding: 0; overflow: hidden; }
#frame { width: 800px; height: 520px; border: 1px solid black; }
#frame {
    zoom: 0.75;
    -moz-transform: scale(0.75);
    -moz-transform-origin: 0 0;
    -o-transform: scale(0.75);
    -o-transform-origin: 0 0;
    -webkit-transform: scale(0.75);
    -webkit-transform-origin: 0 0;
}

<style>
#wrap { width: 600px; height: 390px; padding: 0; overflow: hidden; }
#frame { width: 800px; height: 520px; border: 1px solid black; }
#frame { zoom: 0.75; -moz-transform: scale(0.75); -moz-transform-origin: 0 0; }
</style>

...

<p>Some text before the frame</p>
<div id="wrap">
<iframe id="frame" src="test2.html"></iframe>
</div>
<p>Some text after the frame</p>
</body>

font-size: 80%;