You can't force a "single page" to render as a different page type. Single page might be better thought of as a "unique page." That means there is a specific .php file that is being invoked to create the page, as opposed to a template (PageType) that is being filled in by blocks.

So you can either change the single page .php file, override it in a theme, or change view.php to retheme the page (but then all of your single pages will display the change... and maybe that is what you want).

Note this:
"If a template file matching the Page Type handle is found in the theme, it is used. If a matching filename cannot be found, "default.php" is used. If the page is a single page, view.php is used. "
Source:http://www.concrete5.org/documentation/developers/pages/themes/...

And just to clarify that last paragraph from xaritas -

If you add a "my_single_page".php file to your theme, then the "my_single_page" single page will be rendered using your "my_single_page".php template.

So your choice is to modify view.php for *all* single pages, or override specific ones, using a template with the same handle.