Openlayers 3 - Zoom to Selected Feature (Polygon)

I have an ol.source.ServerVector with several polygons drawn as features. I'd like for the map to zoom to the extent of the selected polygon upon selection, but I'm hitting a wall.

I was able to find this post that helped with zooming to all of the features in the source, but not the selected feature specifically

https://stackoverflow.com/questions/23682286/zoomtoextent-openlayers-3

var extent = source.getExtent();
map.getView().fitExtent(extent,map.getSize());

That works great to zoom to all of my polygons, but I can't seem to find any way to only use the selected feature's extent.