Practically anywhere else. If I really wanted to find it, I'd probably eventually click that hamburger menu, but the only place that I'd be even less likely to look for it is the footer of the page.
In a mobile app it makes a lot more sense, because screen space is so limited and the hamburger button will occupy one of the prime navigation points in the app UI (typically the upper-left or upper-right navigation button slots), so there's obviously not very many possibilities to find something, but even there, if you can possibly avoid using it, you should. As the original article demonstrates, hiding your navigational elements, even on mobile apps, significantly reduces user engagement.
In a desktop website, I can't think of any reason why I would ever use a hamburger menu. Other, more specific menus, sure (e.g. "Sections" in a news site). But if I see the hamburger menu, besides thinking that it's really out of place when not in a mobile app, I also will instantly assume that it's the place to find things that I probably will never need. Basically, if it's something that you might put in the footer of your site, then hiding it in a hamburger is fine. If you think it's something that enough users will want such that the footer would be inappropriate, then don't put it behind a hamburger either.
Well, if there is such a menu, where else would it be?